Manual de Direito do Trabalho
Xavier, Bernardo da Gama Lobo
2011-01-01
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20,787 records were found.
Sol-gel titania particles were investigated, primarily by optical techniques, by systematically varying synthesis, sample handling, and annealing variables. The material phases investigated were amorphous titania, anatase TiO2, and rutile TiO2. Annealing-induced phase transformations from amorphous TiO2 to anatase to rutile were studied by Raman scattering, infrared reflectivity, infrared absorption, x-ray diffraction, and electron energy-loss spectroscopy (EELS). Detailed experiments were carried out on the effects of annealing on the Raman and infrared spectra of anatase nanocrystals. The frequencies of the zone-center transverse optical (TO) and longitudinal-optical (LO) phonons of anatase were determined and were used in analyzing the results obtained on composites consisting of annealed solgel particles.
The TO and LO frequencies ...
The Theory of Brownian Vacancy Driven Walk
(ABSTRACT)
We analyze the lattice walk performed by a tagged member of
an infinite 'sea' of particles filling a d-dimensional
lattice, in the presence of a single vacancy. The vacancy is
allowed to be occupied with probability 1/2d by any of its
2d nearest neighbors, so that it executes a Brownian walk.
Particle-particle exchange is forbidden; the only
interaction between them being hard core exclusion. Thus,
the tagged particle, differing from the others only by its
tag, moves only when it exchanges places with the hole.
In this sense, it is a random walk "driven" by the
Brownian vacancy. The probability distributions for its
displacement and for the number of steps taken, after
n-steps of the vacancy, are derived. Neither is a Gaussian!
We also show that the only nontrivial dimension where ...
Research into the interrelationship between firm strategy and firm performance is fairly common. Not as common is the examination of firm behaviors as an intermediate construct between strategy and performance. Additionally, the construct of adaptability, found in previous research to be highly correlated with performance, has been inadequately examined as an important macro-level construct. This study develops a theoretical model of the interrelationships among these variables and individually tests each of the links in that model with data drawn from the hosiery industry and its experience with the adoption of Electronic Commerce.
The use of the Strategic Orientation of Business Enterprises (STROBE) construct (Venkatraman, 1989a) and a rigorous development of an adaptability index are important components of this research. The S...
New fundamental observables are becoming
accessible with the Leading Proton Spectrometers
(LPS) of ZEUS and H1. This enables us to test
more thoroughly the pQCD mechanism of diffractive
Deep Inelastic Scattering (DIS). Calculations of
the diffractive cross-section in the small
Bjorken x limit have been performed. We have
used the microscopic QCD formalism of
diffractive DIS to find higher twist corrections
to the transverse structure functions and predict
the diffractive slope and azimuthal asymmetries.
We establish duality correspondence between
diffraction into low-mass continuum and vector
meson production, and calculate the diffractive
contribution to the spin structure functions.
Molecular modeling is a term referring to the study of proteins, nucleic acids, lipids, and other bio- or macro- or small molecules at the atomistic level using a combination of computational methods, physico-chemical principles, and mathematical functions. It can be generally sub-divided into two areas: molecular mechanics, which is the treatment of atoms and bonds as Newtonian particles and springs, and quantum mechanics, which models electronic behaviors using the Schrödinger equation and wavefunctions. Each technique is a powerful tool that, when used alone or in combination with wet lab experiments, can yield useful results, the products of which have broad applications in studying human disease models, oxidative damage, and other biomolecular processes that are otherwise not easily observed by experiment alone. Within this docum...
In many situations in the world, the amount of resources available for use is limited. This statement is especially true in the cells of living organisms. During the translation process in protein synthesis, ribosomes move along the mRNA strand constructing proteins based on the sequence of codons that form a gene. The totally asymmetric simple exclusion process (TASEP) models well the translation process. However, these genes are constantly competing for ribosomes and other resources in the cell. To see how finite resources and competition affects such a system, we must construct a simple model to account for the limited resources.
We consider coupling multiple TASEPs to a finite reservoir of particles where the entry rate of particles into the TASEPs depends on the number of particles left in the reservoir. Starting with a single...
Tremendously popular in American society, the breast cancer movement functions through a rhetoric of risk to persuade women to monitor their breasts and thus medicalize their bodies. The vast majority of breast cancer literature available is specifically aimed at women with breast cancer, while the research here examines the way the breast cancer literature actually includes women without breast cancer in its audience, expecting these women to see breast cancer as an eventual experience. The rhetoric of risk focuses on lifestyle choices, the body, genes, and the environment in order to encourage women to engage in body projects to prevent breast cancer. The attention to risk factors without reliable facts produces fear of the body. Prevention of breast cancer, really impossible, becomes synonymous with early detection, thus displacing ...
Effects of Dual Accountability and Purpose
of Appraisal on Accuracy
Rachel L. Fredholm
(ABSTRACT)
This study investigated the effects of accountability and purpose of appraisal on rating and behavioral accuracy. Subjects viewed a videotape of a lecture and were asked to rate the lecturer's performance. Accountability to the ratee (the GTA on the videotape) was held constant. Accountability to a supervisor (a faculty representative) was manipulated such that subjects in the no (supervisor) accountability condition anticipated a meeting with the GTA only; subjects in the weak (supervisor) accountability condition anticipated a meeting with the GTA as well as a supervisory review of the ratings; while subjects in the strong (supervisor) accountability condition were led to believe that they would have to meet with both the GTA and the fac...
Sulfurtransferases, including mercaptopyruvate sulfurtransferase and rhodanese, are widely distributed in living organisms. Mercaptopyruvate sulfurtransferase and rhodanese catalyze the transfer of sulfur from mercaptopyruvate and thiosulfate, respectively, to sulfur acceptors such as thiols or cyanide. There is evidence to suggest that rhodanese can mobilize sulfur from thiosulfate for in vitro formation of iron-sulfur clusters. Additionally, primary sequence analysis reveals that MoeB from some organisms, as well as ThiI of Escherichia coli, contain a C-terminal sulfurtransferase domain. MoeB is required for molybdopterin biosynthesis, whereas ThiI is necessary for biosynthesis of thiamin and 4-thiouridine in transfer ribonucleic acid. These observations led to the hypothesis that sulfurtransferases might be involved in sulfur transf...
